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Securities (Tables) | 3 Months Ended
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Mar. 31, 2018
Investments Debt And Equity Securities [Abstract] |
Available for Sale Securities | The amortized cost and fair market value of available for sale securities and the related gross unrealized gains and losses recognized in accumulated other comprehensive loss were as follows:
March 31, 2018 |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
U.S. Treasury securities and obligations of U.S. government agencies |  | $ | 29,989 |  |  | $ | 89 |  |  | $ | (281 | ) |  | $ | 29,797 |
Obligations of states and political subdivisions |  |  | 115,754 |  |  |  | 2,570 |  |  |  | (661 | ) |  |  | 117,663 |
Mortgage-backed securities in government sponsored entities |  |  | 87,832 |  |  |  | 279 |  |  |  | (1,529 | ) |  |  | 86,582 |
Total debt securities |  | $ | 233,575 |  |  | $ | 2,938 |  |  | $ | (2,471 | ) |  | $ | 234,042 |
December 31, 2017 |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
U.S. Treasury securities and obligations of U.S. government agencies |  | $ | 30,450 |  |  | $ | 100 |  |  | $ | (192 | ) |  | $ | 30,358 |
Obligations of states and political subdivisions |  |  | 114,002 |  |  |  | 4,226 |  |  |  | (172 | ) |  |  | 118,056 |
Mortgage-backed securities in government sponsored entities |  |  | 82,098 |  |  |  | 408 |  |  |  | (690 | ) |  |  | 81,816 |
Total debt securities |  | $ | 226,550 |  |  | $ | 4,734 |  |  | $ | (1,054 | ) |  | $ | 230,230 |
Fair Value of Securities by Contractual Maturity | The amortized cost and fair value of securities at March 31, 2018, by contractual maturity, is shown below. Actual maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations. Securities not due at a single maturity date, primarily mortgage-backed securities and equity securities are shown separately.
Available for sale |  | Amortized Cost |  |  | Fair Value |
Due in one year or less |  | $ | 13,831 |  |  | $ | 13,776 |
Due after one year through five years |  |  | 22,569 |  |  |  | 22,474 |
Due after five years through ten years |  |  | 31,666 |  |  |  | 32,835 |
Due after ten years |  |  | 77,677 |  |  |  | 78,375 |
Mortgage-backed securities |  |  | 87,832 |  |  |  | 86,582 |
Total securities available for sale |  | $ | 233,575 |  |  | $ | 234,042 |
Securities with Unrealized Losses Not Recognized in Income | Securities with unrealized losses at March 31, 2018 and December 31, 2017 not recognized in income are as follows:
March 31, 2018 |  | 12 Months or less |  |  | More than 12 months |  |  | Total |
Description of Securities |  | Fair Value |  |  | Unrealized Loss |  |  | Fair Value |  |  | Unrealized Loss |  |  | Fair Value |  |  | Unrealized Loss |
U.S. Treasury securities and obligations of U.S. government agencies |  | $ | 17,342 |  |  | $ | (158 | ) |  | $ | 9,438 |  |  | $ | (123 | ) |  | $ | 26,780 |  |  | $ | (281 | )
Obligations of states and political subdivisions |  |  | 27,137 |  |  |  | (410 | ) |  |  | 7,168 |  |  |  | (251 | ) |  |  | 34,305 |  |  |  | (661 | )
Mortgage-backed securities in gov’t sponsored entities |  |  | 50,236 |  |  |  | (807 | ) |  |  | 20,926 |  |  |  | (722 | ) |  |  | 71,162 |  |  |  | (1,529 | )
Total temporarily impaired |  | $ | 94,715 |  |  | $ | (1,375 | ) |  | $ | 37,532 |  |  | $ | (1,096 | ) |  | $ | 132,247 |  |  | $ | (2,471 | )
December 31, 2017 |  | 12 Months or less |  |  | More than 12 months |  |  | Total |
Description of Securities |  | Fair Value |  |  | Unrealized Loss |  |  | Fair Value |  |  | Unrealized Loss |  |  | Fair Value |  |  | Unrealized Loss |
U.S. Treasury securities and obligations of U.S. government agencies |  | $ | 20,449 |  |  | $ | (100 | ) |  | $ | 6,617 |  |  | $ | (92 | ) |  | $ | 27,066 |  |  | $ | (192 | )
Obligations of states and political subdivisions |  |  | 4,057 |  |  |  | (41 | ) |  |  | 7,309 |  |  |  | (131 | ) |  |  | 11,366 |  |  |  | (172 | )
Mortgage-backed securities in gov’t sponsored entities |  |  | 29,534 |  |  |  | (195 | ) |  |  | 22,199 |  |  |  | (495 | ) |  |  | 51,733 |  |  |  | (690 | )
Total temporarily impaired |  | $ | 54,040 |  |  | $ | (336 | ) |  | $ | 36,125 |  |  | $ | (718 | ) |  | $ | 90,165 |  |  | $ | (1,054 | )
Schedule of Net Gains and Losses on Equity Investments Recognized in Earnings and Portion of Unrealized Gains and Losses for Period that Relates to Equity Investments | The following table presents the net gains and losses on equity investments recognized in earnings at March 31, 2018, and the portion of unrealized gains and losses for the period that relates to equity investments held at March 31, 2018:
Net gains (losses) recognized in equity securities during the period |  | $ | 40 |
Less: Net gains (losses) realized on the sale of equity securities during the period |  |  | — |
Unrealized gains (losses) recognized in equity securities held at reporting date |  | $ | 40 |

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- Definition Tabular disclosure of the realized and unrealized gains and losses reported in the statement of income which have resulted from the sale and holding of marketable securities, respectively, as well as the sale or disposal of cost method investments. Such amounts would include realized gains and losses on the sale or disposal of trading, available-for-sale, and held-to-maturity securities, unrealized gains and losses on trading securities, unrealized gains and losses on available-for-sale and held-to-maturity securities transferred to the trading securities category, realized gains and losses on the sale or disposal of cost method investments, and losses recognized for other than temporary impairments (OTTI) of such investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27405-111563 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.M) -URI http://asc.fasb.org/extlink&oid=65877573&loc=d3e87990-122713 + Details
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- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
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- Definition For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 + Details
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